POLYVINYL CHLORIDE PLASTISOL COMPOSITION FOR EXPANSION MOLDING AND PRODUCTION OF FOAMED POLYVINYL CHLORIDE ARTICLE USING THE COMPOSITION

摘要

PURPOSE: To obtain a polyvinyl chloride plastisol composition for expansion molding, produced by using a plasticizer having a specific structure as a part of the plasticizers and capable of giving a foamed article free from stickiness and having high stiffness and hardness by thermal expansion molding. ;CONSTITUTION: The objective polyvinyl chloride plastisol composition for expansion molding is produced by compounding (A) 100 pts.wt. of a polyvinyl chloride resin for paste molding (e.g. vinyl chloride/vinyl acetate copolymer) with (B) 40-100 pts.wt. (preferably 45-80 pts.wt.) of plasticizers composed of (i) 5-70wt.% (based on the sum of plasticizers and secondary plasticizers) of a plasticizer of formula (R is 2-4C alkylene; X is 1-10C straight or branched chain alkyl; n is integer of 1-5), (ii) other plasticizers (e.g. phthalate, epoxy or polyester plasticizers) and, as necessary, secondary plasticizers (e.g. chlorinated paraffin) and (C) 2-12 pts.wt. (preferably 3-8 pts.wt.) of a foaming agent [e.g. azodicarbonamide or oxybis(benzenesulfonyl hydrazide)].;COPYRIGHT: (C)1993,JPO&Japio